Driving mechanism.



No. 634,833. Patented Got. In. I899.

-. s. P. PIERSON.

H DRIVING MEGHAMSM.

[Application filed Jan. 26, 1899.)

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UNITED STATES SWAN P. rmnsou, or n'ns'ron, MASSACHUSETTS.

PATENT OFFICE.

DRIVING MECHANISM.

SPECIFTCATION forming part of Letters Patent No.-634,833, dated Qctober 10, 1899. Application filed January 26,1899. Serial No. 703,465. (No model.)

To (2Z5 whom/it may concern:

' Be it known that I, SWAN P. PIER-son, of Easton, in the county of Bristol and State of Massachusetts,have invented certain new and useful Improvements in Driving Mechanism,

of which the following is a specification.

This invention relates to means fortransmitting rotary motion from one shaft to another through a driving-belt and a loose pulley, which is mounted independently of the shaft which it surrounds, so that said shaft is relieved from wearresulting from contact with the loose pulley and from the weight or load of the loose pulley, the loose pulley being movable toward and from the fast pulley and provided with a clutch member, so that when moved toward the fast pulley it will be rotated therewith.

The invention has for its object to provide improved means for operating the loose pulley and the belt-shipper and it consists in the several improvementswhich I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a side elevation of a driving mechanism embodying my invention. Fig. 2 represents a similar elevation, parts of the'mechanism being shown in section. section on line 3 3 of Fig. l and an elevation of the mechanism at the right of said line.'

Fig. 4 representsfa View similar to Fig. 1, showing the belt onthe fast pulley. Fig.v 5 represents a view similar to Fig. 1, showing the belt ona loose pulley, the belt-operating lever being removed. Fig. 6 represents a section on line 6 6 of Fig. 5. 1

The same letters of reference indicate the same parts in all the figures. Y

In the drawings, (t represents the drivingshaft, journaled in suitable hangers, one of which, the hanger b, is constructed .with a til? bular extension I), which serves as a pulleys'upport to permit the rotation, as well as the lateral movement, of a loose pulley 0 without permitting said loose pulley to bear on the shaft.

d is the driving-pulley, which is fast upon the shaft a and islocated in close proximity to the loose pulley c.

e represents the driven shaft, and f a pulley affixed thereto and engaged with the driving- Fig. 3 represents a naled in a bearing g on the hanger h. The

lower end of the shipper is engaged with the belt,so that it can move the latter edgewise, the shipper being shown as provided with a loop 9 embracing the belt. hen the shipper is in the position shown in Figs. land 5,

The pulley f 5 5 it holds the belt on theloose pulleys, and

when moved to the position shown in Fig. 4 it transfers the belt to the fast pulley d.

The shipper 9 may be operated by any suitable means, such as the lever c, which is attached to the rock-shaft g and is provided with a stud i, which enters a segmental slot 9 in the shipper. The lever i and the rockshaft g are also utilized as parts of a mechanism for moving the loose pulley 0 toward and from the fast pulley d, thus causing the engagement of friction-clutch members 0 and 01', located, respectively, on the pulleys c d when the loose pulley is moved'toward the fast pulley, and the separation of said clutch members when the loose puileyis moved in the opposite direction. The object of this engagement of the two pulleys is to cause the. rotation of the loose pulley with the fast pulley just before the belt is shipped from one to the other, so that there will be no sudden strain on the belt, as might be the case if the loose pulley were motionless when the belt is being shipped from it onto the moving fast pulley and fromthe fast pulley back to the loose pulley. The otherparts for moving the loose pulley toward and from the fast pulley in this embodiment of my invention'are as follows:

7' represents a lever which is fulcrumed at j and is forked at itslower end, the arms of the fork engaging a groove in the hub of the loose pulley.

10 lo represent arms affixed to the rock-shaft g and projecting in opposite directions therefrom.

' the; upper end of: the: lever ,j and normally} forces. it to the: position shew-sin Figs; 1,1 2:,

- sepas' 1o 7 V, V

1 V. WVhe n the belt is to be --shipped1 from the; loose toc'thei fast pulley, the :le ver is i moved.

' ,i-an sort-hatthe shipperis not :meve'dby' the lever nntilthe two pulleys have been conneet@14 So that the belt set-in motio'nby thee loose pulley before itistransferred to the" Vfastkpul ley :and strain on: thebeltisiavoided; i

lt lt'fi represe-nt rods pivoted, 'respectively, 7 to thearmsitikand passingleoselythrought orificesin theupper arinef the leverji said 1 rods havingnutsor eilltligfilllellbihk k armrepresents a springivhicii bears against z 7 andi, the looseipnllyfibeingithus held ratedf'roin the fast pulley d. r

in the direct-innit:dicatedby the arrow iul'I-ig;

fast pulley; Theslotg in' the shipper is an- 7': When the belt is to be shipped te the loose pulley, theiever i direction of the :arrow ind-Fig f the} loesepulley isfrotating when it; receives the belt.

of the lever i to move the loose pulley into contact with the fast pulley, so that the clutch members are connected before each change of position of the belt.

The slot g and stud 2" constitute a loose connection between the shipper and the lever '5, whereby provision is made for operating the shipper by the mechanism which moves the loose pulley toward and from the fast pulley, the said loose connection enabling the shipper to be moved only after the loose pulley has been engaged with the fast pulley.

Means are provided for holding or locking the shipper g in either of the positions shown in Figs; 1 and 4 to prevent liability of accidental displacement of the belt, said means, as shown in Figs. 1, 4i, 5, and 6, comprising two spring-clips o, affixed to an arm or supportp and adapted to grasp the shipper and hold it against accidental movement in either of said positions. y

In Fig.7 Ishow as a substitute for the springclips 0 0 two latches q q, formed on arms which are pivoted at r r to ears formed on the support 19, said arms being pressed outwardly by springs s s and provided with oblique portions 25 t at their outer ends, which are held by the springs s s in the path of the lever 2'. Vhen the said leveris at the extreme of its movement, (shownin Fig. 1,) it acts on the incline I, connected with the latch q and 1 ranged to bearononesideofsaid leve s}; r

1, this 'movein ent turning the ilOtliiShfifilQ Q and causing the arm and redv J9 to pull the; leverj to the position shown in Fig, Qthje lever thenengaging the loose pulley with the from the fast moved in the: i 4 this movecl ment turning the rnekrshaft g in thedirec- ,,-;tion required tcieauseithe armil fandrodilti ;--to m ov.e thejl everj as before,-thnsf thiio wing gthjelcese pulleyintoengageinentwiththe fast pulley j nst befe re ;the belt is shippemso-zthat 1 I The shaft arms 1 It it, and rods i con stitute a donbleacting connection between: tl1e leverstand g, enablingieach move n11 ent' transfer thezbelt'to the loose pulley, latches g g have beveled faces which" permit :When the-lever t is moved in the opposite dithe' latchiq, on reaching the positienshown in perpos' ively; p p A a 41 do not limitmyself' to the vention A positive; clutch may bee'rnployed twnp'ositiensfi p p g V T r it will be seen: that the usual lease pulieythe driven shaft.

Having thus explained the nature of my in Vention and described a way of constructing and using the same, although withouthaving attempted to set forth all the forms in which it may be embodied or all the modes of its use, I declare that what I claim isl. A rotary shaft, a bearing therefor having a pulley-support, a fast pulley on said shaft, a laterally-movable loose pulley on said support beside the fast pulley, clutch members on said pulleys, and loose-pulley-shifting mechanism comprising a pivoted lever engaged with the loose pulley, an operating-lever, and a double-acting connection between the two levers whereby a movement of the operating lever in either direction is caused to move the loose pulley toward the fast pulley.

2. A rotary shaft, a bearing thereforhaving a pulley-support, a fast pulley on said shaft, a laterally-movable loose pulley on said support beside the fast pulley, clutch members on said pulleys, loose-pulley-shifting mechanism comprising a pivoted lever engaged with the loose pulley, an operating-lever, and a doubleacting connection between the two levers, whereby a movement of the operating-lever in either direction is caused to move the loose pulley toward the fast pulley, and a belt-shipper-engaged with the operating-lever and operated thereby.

e dotted lines, s: ree latchesq q 'icclnthezship-g forces saidlateh; backfrom its operative 120:" I "sition'just viloefore the "shipper-is moved; to i p 7 'theshipper to movepasteaeh latch; thelateh s yieldingwhileithe shipper is passin ganid then i a f springing out to engage"theshipper:' Thus,"

when theilever has"displaced theiatchig and theshipiper is'xnovediin thedireetionindicated by th'e'arrowin Fig." 7 thejlatchqfirst yields :to bljlfiQlllPilQlilflfli thenspringsout, locking 5 r i the shipperin thepositiionshewuinfull lines;

:86 I treotion; it displaces 'the lateh'q, and thus rel-- j, i lease-s the shipper; which: is again lockedby f details of cena i i struetien'here shown'anddescribed and may r Vvarieuslyfmodifyand;depart fm,mj;hg;sameiw without departing from theispiritof my ine 1 e e g to connect-the pulleys cdinsteadofa f rietiotav j, -cluteh,ant any other suitabie nieansi:maybe I V r V employed to holdior lock; the; shipper inits I won theidrlvenyshaftiis: dispensed withgf the a 1 V loose pulleyrbeingsupperted on -an indepe'n-d- Lent bearingsurreuuding; the dritvingshaftv He'retefore theloesepn lleyhasbeenmounted Oflllllfi driven shaft e,and-the: fast pulley on" shaft has been necessarily made 1 2': {If stfiieient Width t a'ecoiinmodatejthe belt P ;When on'eitherthe'fast :cr'fthe lecse puliey'ef'Y 7 l rec pulley to the other, mechanism for moving the' loose pulley toward and from the fast pulley, and a loose connection between said mechanism and the belt-shipper, whereby the latengaged with the fast pulley. In testimony whereof I have affixed my signature in presence of two witnesses.

SWAN P. PIERSON.

l ter is operated after the loose pulley has been 10 l Witnesses:

O. F. BRO N, A. D. HARRISON. 

